git-tar needs to clone with a unique path (including branch)

[alexellis]

git-tar needs to clone with a unique path (including branch)

Expected Behaviour

git-tar should clone to a path like: /tmp/owner/repo/branch to avoid conflicts

Current Behaviour

It clones to:

func clone(pushEvent sdk.PushEvent) (string, error) {
	workDir := os.TempDir()
	destPath := path.Join(workDir, path.Join(pushEvent.Repository.Owner.Login, pushEvent.Repository.Name))

This could lead to conflicts if building two branches on the same OFC installation

Possible Solution

1. Enhance the path to avoid conflicts. (see: git-tar/function/ops.go)
2. A fix must include a unit test - ideally one which mocks out the exec step to git clone.